The ability to create custom profiles is great as well have it running in our production environment without having problems with performance or other issues that might arise when using third party tools, such as DeviceAtlas for example. I cannot think of anything negative about this software so far! If you are looking at creating your own solution then definitely give them another look because they can help solve most use cases by allowing customization around devices/os versions etc. We were able to reduce support costs significantly while also improving customer satisfaction through better reporting capability than traditional methods (e.g., manual testing).